Potential Nexus 7 II passes through FCC
An Asus with model number K009 and branding of "Nexus" has passed through the FCC.
Qualcomm S4 Pro, 2 GB RAM, 1080p Screen, Blutooth 4.0 LE, 4000mAh battery, Rear facing camera, potential LTE.
I don't know if this means a release is imminent or not, but it seems like it would suggest that. It also suggests a potential for Android 4.3 (Jelly Bean part 3) to be released soon.